120 MANUAL OF FRUIT DISEASES . 



picking, the fruit should be graded carefully, and suspicious or 

 affected fruits should be discarded. 



REFERENCES ON PINK-ROT 



Eustace, H. J. A destructive apple rot following scab. New York 



(Geneva) Agr. Exp. Sta. Bui. 227 : 367-389. 1902. 

 Craig, John, and Van Hook, J. M. Pink rot an attendant of apple scab. 



Cornell Univ.. Agr. Exp. Sta. Bui. 207 : 161-171. 1902. 

 Ivanov, K. S. tiber Trichothecium roseum Link, als ursache der 



bitterfaule von friichten. Zeitschr. f. Pflanzenkrankheiten, 14 : 



36-40. 1904. 



WATER-CORE 

 Caused by abnormal water relations 



Some varieties of apples under certain conditions show a 

 peculiar glassiness in and about the core. The Fall Pippin is 

 said to be badly affected, and the disease has been observed on 

 several other varieties, including the Early Harvest, Yellow 

 Transparent, Pound Sweet, Tompkins King and Rambo. In 

 general, summer varieties suffer most. 



Water-core has undoubtedly been present in the apple sections 

 of the world for many years, but authoritative records are not 

 old. It was noted in Maryland in 1908, but is thought to have 

 occurred there several years before. Reports have recently 

 come from other regions of the United States which make it 

 certain that the trouble occurs generally over the country, 

 particularly in arid and semi-arid districts. Apple-growers of 

 Europe, Asia, Africa and Australia are familiar with this pecul- 

 iar disease in the fruit, and the complaints which come from 

 these continents indicate its troublesome nature. 



Symptoms. 



Affected fruits are found more particularly on the tops of 

 thrifty trees, and on healthy branches which have less foliage as a 

 result of having been pruned back. Shaded fruits may be 



